Bought a HIS 3D graphics card (Radeon 4600 series). The only video output that works is to my monitor. Will not detect my Sony TV (either with Windows 7 utility or Catalyst Control Center utility) via HDMI output. Won't work with a DVI to HDMI connection either. Both worked fine when I was using the Windows 7 beta, 32-bit. But then I installed official release Windows 7 64 bit and no detection. It looks like others are having similar problems. Anyone?